periodic

[peer-ee-od-ik] / ˌpɪər iˈɒd ɪk /

ADJECTIVE

at fixed intervals

Synonyms

STRONGEST

annual intermittent monthly occasional recurrent recurring regular repeated routine seasonal sporadic weekly yearly

STRONG

periodical

WEAK

alternate at various times centennial cyclic cyclical daily epochal every once in a while every so often fluctuating hourly infrequent isochronal isochronous on certain occasions on-again-off-again orbital perennial rhythmic serial spasmodic

Antonyms

STRONGEST

constant infrequent unusual

WEAK

continual irregular lasting permanent sporadic variable

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

It is the first example in which scientists have confirmed exactly what is causing the periodic behavior.

From Science Daily • Jun. 2, 2026

Semiliquid vehicles like interval funds, nontraded business development companies do offer periodic liquidity, typically quarterly redemptions capped at 5% of net asset value.

From Barron's • May 30, 2026

Contrarians believe it’s far more revealing to analyze the timers’ behavior whenever the market experiences one of its periodic one-day plunges.

From MarketWatch • May 28, 2026

This property is one reason the periodic table contains so many different elements.

From Science Daily • May 9, 2026

The periodic passage of the solar system through spiral arms may conceivably have had important consequences for us.

From "Cosmos" by Carl Sagan

Vocabulary lists containing periodic

Freak the Mighty

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Word Generation Science - Introductory Chemistry Concepts

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Essential English Vocabulary, List 3

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